$dateRange не определен

Я следую этому руководству: https://docs.microsoft.com/en-us/graph/tutorials/php?tutorial-step=4

Однако мне не удалось перечислить все события в моем календаре. Я смог сбросить файл json, используя это:

return response()->json($events); 

Однако после замены этой строки на:

$viewData['events'] = $events;
return view('calendar', $viewData);

Я получил эту ошибку:

ErrorException Неопределенная переменная: dateRange (представление: C:\Users\syahm\FWIMS\resources\views\calendar.blade.php) http://localhost:8000/calendar Скрыть решения $dateRange не определен

Мой контроллер.blade.php:

@extends('layout')

@section('content')
<h1>Calendar</h1>
<h2>{{ $dateRange }}</h2>
<a class="btn btn-light btn-sm mb-3" href={{action('CalendarController@getNewEventForm')}}>New event</a>
<table class="table">
  <thead>
    <tr>
      <th scope="col">Organizer</th>
      <th scope="col">Subject</th>
      <th scope="col">Start</th>
      <th scope="col">End</th>
    </tr>
  </thead>
  <tbody>
    @isset($events)
      @foreach($events as $event)
        <tr>
          <td>{{ $event->getOrganizer()->getEmailAddress()->getName() }}</td>
          <td>{{ $event->getSubject() }}</td>
          <td>{{ \Carbon\Carbon::parse($event->getStart()->getDateTime())->format('n/j/y g:i A') }}</td>
          <td>{{ \Carbon\Carbon::parse($event->getEnd()->getDateTime())->format('n/j/y g:i A') }}</td>
        </tr>
      @endforeach
    @endif
  </tbody>
</table>
@endsection

Мой CalendarController.php:

<?php

namespace App\Http\Controllers;

use App\Http\Controllers\Controller;
use Illuminate\Http\Request;
use Microsoft\Graph\Graph;
use Microsoft\Graph\Model;
use App\TokenStore\TokenCache;
use App\TimeZones\TimeZones;

class CalendarController extends Controller
{
  public function calendar()
  {
    $viewData = $this->loadViewData();

    $graph = $this->getGraph();

    // Get user's timezone
    $timezone = TimeZones::getTzFromWindows($viewData['userTimeZone']);

    // Get start and end of week
    $startOfWeek = new \DateTimeImmutable('monday -1 week', $timezone);
    $endOfWeek = new \DateTimeImmutable('monday', $timezone);

    $queryParams = array(
      'startDateTime' => $startOfWeek->format(\DateTimeInterface::ISO8601),
      'endDateTime' => $endOfWeek->format(\DateTimeInterface::ISO8601),
      // Only request the properties used by the app
      '$select' => 'subject,organizer,start,end',
      // Sort them by start time
      '$orderby' => 'start/dateTime',
      // Limit results to 25
      '$top' => 25
    );

    // Append query parameters to the '/me/calendarView' url
    $getEventsUrl = '/me/calendarView?'.http_build_query($queryParams);

    $events = $graph->createRequest('GET', $getEventsUrl)
      // Add the user's timezone to the Prefer header
      ->addHeaders(array(
        'Prefer' => 'outlook.timezone="'.$viewData['userTimeZone'].'"'
      ))
      ->setReturnType(Model\Event::class)
      ->execute();

      $viewData['events'] = $events;
      return view('calendar', $viewData);
  }

  private function getGraph(): Graph
  {
    // Get the access token from the cache
    $tokenCache = new TokenCache();
    $accessToken = $tokenCache->getAccessToken();

    // Create a Graph client
    $graph = new Graph();
    $graph->setAccessToken($accessToken);
    return $graph;
  }
}

Добавлен 'dd($viewData);' в мой calendarcontroller.php, и я получил это:

array:4 [▼
  "userName" => "ABC"
  "userEmail" => "ABC@localhost"
  "userTimeZone" => "Eastern Standard Time"
  "events" => array:3 [▼
    0 => Microsoft\Graph\Model\Event {#310 ▼
      #_propDict: array:6 [▼
        "@odata.etag" => "W/"3ixz55KajUefR0tOGmhiSQABIRK5QA==""
        "id" => "AAMkAGZlZWE2N2ZlLTczM2ItNDI2Ny05NWU0LTZmOWFiNzZmZmJhZABGAAAAAAC85uAHa4F5RpnXBxFnN2zgBwDeLHPnkpqNR59HS04aaGJJAAAAAAENAADeLHPnkpqNR59HS04aaGJJAAEhezxbAAA="
        "subject" => "AA 2"
        "start" => array:2 [▼
          "dateTime" => "2020-11-23T09:30:00.0000000"
          "timeZone" => "Eastern Standard Time"
        ]
        "end" => array:2 [▼
          "dateTime" => "2020-11-23T16:30:00.0000000"
          "timeZone" => "Eastern Standard Time"
        ]
        "organizer" => array:1 [▼
          "emailAddress" => array:2 [▼
            "name" => "AA"
            "address" => "AA@localhost"
          ]
        ]
      ]
    }
    1 => Microsoft\Graph\Model\Event {#296 ▼
      #_propDict: array:6 [▼
        "@odata.etag" => "W/"3ixz55KajUefR0tOGmhiSQABIl5/QA==""
        "id" => "AAMkAGZlZWE2N2ZlLTczM2ItNDI2Ny05NWU0LTZmOWFiNzZmZmJhZABGAAAAAAC85uAHa4F5RpnXBxFnN2zgBwDeLHPnkpqNR59HS04aaGJJAAAAAAENAADeLHPnkpqNR59HS04aaGJJAAEhezxcAAA="
        "subject" => "AA 3"
        "start" => array:2 [▼
          "dateTime" => "2020-11-25T09:30:00.0000000"
          "timeZone" => "Eastern Standard Time"
        ]
        "end" => array:2 [▼
          "dateTime" => "2020-11-25T16:30:00.0000000"
          "timeZone" => "EasternStandard Time"
        ]
        "organizer" => array:1 [▼
          "emailAddress" => array:2 [▶]
        ]
      ]
    }
    2 => Microsoft\Graph\Model\Event {#306 ▼
      #_propDict: array:6 [▼
        "@odata.etag" => "W/"3ixz55KajUefR0tOGmhiSQABIwjzEw==""
        "id" => "AAMkAGZlZWE2N2ZlLTczM2ItNDI2Ny05NWU0LTZmOWFiNzZmZmJhZABGAAAAAAC85uAHa4F5RpnXBxFnN2zgBwDeLHPnkpqNR59HS04aaGJJAAAAAAENAADeLHPnkpqNR59HS04aaGJJAAEjdLLVAAA="
        "subject" => "AA 4/2020 "
        "start" => array:2 [▼
          "dateTime" => "2020-11-26T14:30:00.0000000"
          "timeZone" => "Eastern Standard Time"
        ]
        "end" => array:2 [▼
          "dateTime" => "2020-11-26T16:00:00.0000000"
          "timeZone" => "Eastern Standard Time"
        ]
        "organizer" => array:1 [▼
          "emailAddress" => array:2 [▼
            "name" => "AA"
            "address" => "AA@localhost"
          ]
        ]
      ]
    }
  ]
]